Wireless Lan
Technically unsupported by Intel but still doable.
Make sure you have the following support in the kernel:
Generic Driver Options ->
<M> Hotplug firmware loading support
Networking support ->
Wireless LAN (non-hamradio) ->
[*] Wireless LAN drivers (non-hamradio) & Wireless Extensions
Cryptographic options ->
<M> ARC4 cipher algorithm
<M> Michael MIC keyed digest algorithm
<M> CRC32c CRC algorithm
Go to this website: http://ipw2200.sourceforge.net/ and download the ipw2200 driver package.
I am personally using version 0.12 at the moment without any issues. Try a newer version if you like.From there untar it,
enter the directory it makes and make then make install the package. It will build the drivers for you. Now you should be
able to modprobe ipw2200 in and have it show up as eth1. It will not show up as a wireless device, but it will work as one.
For more details see this thread - http://forums.gentoo.org/viewtopic.php?t=217688&highlight=
ACPI Support:
One of the best parts of the Centrino chipset is the CPU frequency scaling. Without it you burn your battery life
super mega fast and the CPU fan never shuts up. That is obnoxious.
Here is my relevant APCI related Kernel Config:
Power management options (ACPI, APM) --->
[*] Power Management support
[ ] Power Management Debug Support
[*] Software Suspend (EXPERIMENTAL)
Power management options (ACPI, APM) ---> ACPI (Advanced Configuration and Power Interface) Support --->
[*] ACPI Support
[*] Sleep States (EXPERIMENTAL)
<*> AC Adapter
<*> Battery
<*> Button
<*> Fan
<*> Processor
<*> Thermal Zone
(0) Disable ACPI for systems before Jan 1st this year
Power management options (ACPI, APM) ---> CPU Frequency scaling --->
[*] CPU Frequency scaling
<*> /proc/cpufreq interface (deprecated)
Default CPUFreq governor (performance)
<*> 'powersave' governor
<M> 'ondemand' cpufreq policy governor
<*> CPU frequency table helpers
<M> Intel Enhanced SpeedStep
[*] Use ACPI tables to decode valid frequency/voltage pairs (EXPERIMENTAL)
Next install acpid and add it to your stratup scripts. In Gentoo all you need to to is
emerge acpid
rc-update add acpid default
Now make sure the right modules are loaded. cpufreq_ondemand and speedstep_centrino are the two we are looking for.
You can just modprobe them in. Once you have the modules in place you will want to issue the following command.
echo "ondemand" > /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor
After that is run your CPU should scale back on its own. Next we need to set it all up to activate at boot.
Get the speedstep_centrino and cpufreq_ondemand modules to come up at boot. In Gentoo this is just adding them to
the /etc/modules.autoload.d/kernel-2.6 file. Next we need to get the echo command to run at boot too as the scaling_governor
file is overwritten everytime the system boots. Again, in Gentoo I added a script to /etc/init.d
I didn't write it, thanks to the guy who did. To add it to startup in Gentoo
just create it as an executable file in /etc/initd/ and "rc-update WhateverYouNameIt defualt"
Here it is:
#!/sbin/runscript
# email: insanity5902@gmail.com
# ------
depend() {
need localmount acpid
}
checkconfig() {
if [ ! -e /proc/cpufreq -a ! -e /sys/devices/system/cpu/cpu0/cpufreq ] ; then
eerror "CPUFreq support has not been compiled into the kernel"
return 1
fi
}
start() {
checkconfig || return 1
ebegin "Switching to OnDemand"
#if [ cat /sys/devices/system/cpu/cpu0/cpurfreq/scaling_governor == "ondemand" ] ; then
# eecho "OnDemand is already activated"
#else
echo 'ondemand' > /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor
#fi
eend $?
}
stop() {
ebegin "Stopping OnDemand"
echo 'userspace' > /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor
eend $?
}
Still confused? Go here
Sound:
This was a bit of a pain, but had an easy fix at the end of the road. Here is my related kernel configs.
Device Drivers ---> Sound --->
<*> Sound card support
Advanced Linux Sound Architecture --->
<M> Advanced Linux Sound Architecture
PCI devices --->
<M>Intel i8x0/MX440, SiS 7012; Ali 5455; NForce Audio; AMD768/8111
Modprobe in the above drivers, install alsa-utils and heres the tricky part- in alsamixer MUTE external amp output.
Until that is done you wont get any audio output, it drove me nuts.
To get the modules to load at startup edit your /etc/modules.d/alsa to have only the following:
options snd cards_limit=1
...and thats it for sound.
make.conf:
This may be helpful. Here is the important parts of my make.conf file. Remeber the -O2 is a capital o (letter)
, not a zero.
CFLAGS="-O2 -mcpu=i686 -fomit-frame-pointer"
CHOST="i386-pc-linux-gnu"
CXXFLAGS="${CFLAGS}"
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